Karma Grind Block Black Size:L This high end mini pump is Size:39 This high end mini pump is made of 6063 aluminum The 3D Adapt padding is made out of cast polyurethane (PU) molded to perfection around your foot to deliver a level of control and comfort never experienced before on Inline skates This feature in addition to backslide plates will create two points of contact while grinding or stalling and this will open a whole new world for grinding trick fanatics The black colored block comes with hardware that matches perfectly with Chaya Shari plates as well as to Chaya Shiva and Ophira plates as well as SNEEKRSKATE plates when the special adapter is used